Drilling, punching, and mortising machine



Patented Aug. 16, 1938 UNETED STATES rArENr orties DRILLING, PUNCHING,AND MORTISING MACHINE 3 Claims.

This invention relates to combination drill, punching and mortisingmachines, and has for its main object the provision of such a machinewhich is simple in construction and efcient and economical in operation.A worker using the machine can quickly change it over from one of itsfunctions to another, so that a minimum amount of time is lost, and themachine results in a great `increase in productive eiciency.

fr@ The above and other objects will become apparent in the descriptionbelow, in which characters of reference refer to like-named parts in theaccompany drawing, forming a part hereof.

Referring briey to the drawing, Figure 1 is a -lf front elevational viewof the machine.

Figure 2 is a cross-sectional View taken on the line 2 2 of Figure l.

Figure 3 is a cross-sectional View taken on the line 3 3 of Figure 1.

.20 Figure 4 is a cross-sectional view taken on the line 4-4 of Figurel.

Referring in detail to the drawing, the numeral ii! represents astandard composed of a pair of spaced apart uprights II and I2 joined atthe top gg; by a cross piece I3. The uprights II and I2 are formed ofchannel irons having their channels juxtaposed. and likewise thecross-piece I3 is formed of a channel iron, with its channel facingdownward. A table I5 is mounted between brackets I1 secured to thestandard Ill and legs I3 at a distance therefrom, and a table apron I3is, supported within the uprights II and I2 by a channel ironcross-member I9. The legs I6 are braced near the bottom by a member I 4.

Coiled springs 23 depend from the cross-piece I3 and support a hollowslide bar 2l whose extremities are slidable in the channels of theuprights II and I2. Bent rods 22 are attached to the bar 2l and hangtherefrom, the lower ends l, thereof being secured to the extremities ofa cross-arm 23. A rod 24 extends centrallyr from the latter and ispivoted to a foot lever 25 which in turn is pivotally attached to thebrace I4. It is obvious that depression of the pedal 25 will 5 draw thebar 2I downward, and release of the pressure will permit the springs 20to raise the bar.

A platform 23 is supported on brackets 21 within the width of theuprights II and I2 and be'- 50 tween the same. A hand Wheel 28 has itsshaft 29 extending through the upright II and a bevel gear 3l) is on theend of this shaft. The gear 30 engages a bevel gear 3! on the end of ashaft 32 which extends upward through the platform 26 55 and through asecond platform 33 above the rst platform. A gear 34 is rigid on theshaft 32 flush against the platform v26.

A vertical rack 35 is secured at its upper end tothe cross-piece I3 andat its lower end 33 (extending at right-angles) on the platform 33. vA,A 5. shaft 31 extends slidably through aligned openings in the end 36of the rack and the platform 33, the lower end of the shaft continuingthrough a similar opening in the platform 26 and having at its extremitya socket into which a screw 33 .10 projects.` The socket is-adapted tohave various tools interchangeably locked therein by the screw 38. y

The upper end of the shaft 31 is rotatably secured, withv the use ofball bearings, to the hollow ,15 split bar 2I whosetwo sides areunitedby bolts 39. A rack pinion 43, in mesh with the rack is retainedthereagainst by aslidable strap 4i, and arms 42 which depend rigidlyfrom the` strap 4I are rigid with the top of the bar 2 I. A' crank ,2043 is rotatable oril shaft 44 of the pinion 43, and the pinion vhas aratchet wheel 45 rigid on the side thereof and engaged by the pawl 43 ofthe crank 43. `The ratchet and pawl construction and thespring-controlled pawl of the crank are 25 all of standard constructionand their mode of operation is apparent.. The crank 43, wheninoperative, may be held inraised position by a stiif wire hook 53. Itis also obvious that, when the crank 43 is rotated in a clockwisedirection 30 Figure 2, the shaft 31 will be carried downward.. The shaft31 is provided with a keyway 41 through a length normally lying betweenthe platforms 26 and 33. A gear 48 loosely surrounds the shaft 31 justabove the platform 2t. This 35 gear has a rigid collar 49 having aradial opening therethrough, through which a pin 53 slidably projects. Awinged member 5I! is secured about the pin 5I, and on the ends of thismember the ends of a coiled spring 54, which is looped around 40 thecollar 49, are attached. The spring 54 is in frictional contact with theperipheral surface of the collar 49. It is thus obvious that the pin 53is normally urged toward the center of the co1- lar. When the pin 53lies in the keyway 41 of 45 the shaft 31, the shaft 31 will rotate withthe gear 43. To unlock the gear 48 from the shaft 31, the pin 50 issimply extracted by hand and the keyway is moved to one side of the pin53 by turning the hand wheel 2B through a small arc. 50

To use the device as a drill, the crank 43 is worked to bring the shaft31 downward until the drill 52 is at the desired level near the tablewith the pin 53 registering in the keyway 41 of the shaft 31. The handwheel 28 is then turned. 55

The operation of mortising or gouging out is performed in the samemanner, with the substitution of the proper tool for the drill 52. Whenit is desired to do punching, a punch is substituted for the drill 52and the punch is brought down against and raised from the Work on thetable by operating the pedal 25, whence the punching can be accomplishedat a fast rate.

It is thus apparent that an efficient and practical machine has beendevised for the purposes mentioned, which can be quickly changed over`from use for one operation to another. Obviously, modifications in formand structure may be made without departing from the spirit and scope ofthe invention.

I claim:

1. A machine of the class described comprising an upright frame having apair of spaced apart sides and a top, a cross bar slidably mountedbetween said sides, springs normally urging said bar toward said top, a'table mounted between said sides, and upper platform and a lowerplatform secured to said sides 'intermediate said table and said top, avertical shaft depending from said bar and having its upper endrotatably supported therein, said shaft passing loosely through saidplatform, a pinion rotatably mounted on said bar, a vertical rackextending between said top and said upper platform, said pinion engagingsaid rack, crank means for rotating said pinion to raise or lower saidbar and shaft, a gear loose on said shaft and flush against said lowerplatform, said shaft having a keyway between said platforms, a rigidcollar on said gear having a radial opening therethrough, a pin slidablymounted in said opening against said shaft, a hand wheel mounted on saidframe, and means for rotating said .gear upon rotation of said handwheel.

2. A machine of the class described comprising an upright frame having apair of spaced apart sides and a top, a cross bar slidably mountedbetween said sides, springs normally urging said bar toward said top, avtable mounted between said sides, and upper platform and lower platformVsecured to said sides intermediate said table and said top, a verticalshaft depending from said bar and having its upper end rotatablysupported therein, said shaft passing through said platforms, a pinionrotatably mounted on said bar, a vertical rack extending between saidtop and said upper platform, said pinion engaging said rack, crank meansfor rotating said pinion to raise or lower said bar and shaft, a gearloose on said shaft and flush against said lower platform, said shafthaving a keyway between said platforms, a rigid collar on said gearhaving a radial opening therethrough, a pin slidably mounted in saidopening, resilient means normally urging said pin through said openingagainst said shaft, a hand wheel mounted on said frame, and means forrotating said gear upon rotation f said hand wheel, a cross-membersuspended from said bar lying near the bottom of said frame, a footpedal rotatably mounted near the bottom of said frame and having meansconnected with said crossmernber for lowering said cross-member upondepression of said pedal.

3. A machine of the class described comprising an upright frame having apair of spaced apart sides and a top, a cross bar slidably mountedbetween said sides, springs normally urging said bar toward said top, atable mounted between said sides, and upper platforms and a lowerplatform secured to said sides intermediate said table and said top, avertical shaft depending from said bar and having its upper endrotatably supported therein, said shaft passing loosely through saidplatforms, a pinion rotatably mounted on said bar, a vertical rackextending between said top and said upper platform, said pinion engagingsaid rack, crank means'for rotating said pinion to raise or lower saidbar and shaft, a gear loose on said shaft and flush against said lowerplatform, said shaft having a keyway between said platforms, a rigidcollar on said gear having a radial opening therethrough, a pin slidablymounted in said opening resilient means normally urging said pin throughsaid opening against said shaft, a hand Wheel mounted on said frame, andmeans for rotating said gear upon rotation of said hand wheel, the lowerextremity of said shaft having a socket therein and means for releasablylocking a tool in said socket.

HERMANN J. KAISER.

